What do buggies sharpen their beaks on?

Buggies, or birds like cockatoos and parrots, sharpen their beaks on hard surfaces such as tree branches, seeds, or nuts. These surfaces help maintain the health and shape of their beaks, allowing them to efficiently crack open tough shells and manipulate food. In captivity, they may also use toys or other materials designed for beak maintenance. This behavior is essential for their overall well-being and feeding capabilities.